linux-kernel - [PATCH 4.14 187/222] media: em28xx: make v4l2-compliance happier by starting sequence on zero

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Date:   Sun, 11 Nov 2018 14:24:44 -0800
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Subject: [PATCH 4.14 187/222] media: em28xx: make v4l2-compliance happier by starting sequence on zero

4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>

commit afeaade90db4c5dab93f326d9582be1d5954a198 upstream.

The v4l2-compliance tool complains if a video doesn't start
with a zero sequence number.

While this shouldn't cause any real problem for apps, let's
make it happier, in order to better check the v4l2-compliance
differences before and after patchsets.

This is actually an old issue. It is there since at least its
videobuf2 conversion, e. g. changeset 3829fadc461 ("[media]
em28xx: convert to videobuf2"), if VB1 wouldn't suffer from
the same issue.

Cc: stable@...r.kernel.org
Fixes: d3829fadc461 ("[media] em28xx: convert to videobuf2")
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/media/usb/em28xx/em28xx-video.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/media/usb/em28xx/em28xx-video.c
+++ b/drivers/media/usb/em28xx/em28xx-video.c
@@ -900,6 +900,8 @@ static int em28xx_enable_analog_tuner(st
 	if (!mdev || !v4l2->decoder)
 		return 0;

+	dev->v4l2->field_count = 0;
+
 	/*
 	 * This will find the tuner that is connected into the decoder.
 	 * Technically, this is not 100% correct, as the device may be